DE970643C - Arrangement for inductive surface heating of metallic workpieces - Google Patents
Arrangement for inductive surface heating of metallic workpiecesInfo
- Publication number
- DE970643C DE970643C DEA12108D DEA0012108D DE970643C DE 970643 C DE970643 C DE 970643C DE A12108 D DEA12108 D DE A12108D DE A0012108 D DEA0012108 D DE A0012108D DE 970643 C DE970643 C DE 970643C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- heating
- current density
- arrangement
- workpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Description
Anordnung zur induktiven Oberflächenerwärmung von metallischen Werkstücken Bei Anordnungen zur induktiven Oberflächenerwärmung von metallischen Werkstücken, beispielsweise zum Zwecke der Härtung durch anschließendes Abschrecken, ist es 1>eka,nnt, den geschlossenen Induktorkreis aus einem Heizleiter bzw. Induktor verhältnismäßig geringen Querschnittes und einer Stromrückführung verhältnismäßig großen Querschnittes zusammenzusetzen. Es ist auch bekannt, die Stromdichte in den einzelnen Teilen des Heizleiters durch Anordnung verschiedener Querschnitte verschieden zu machen. Es ist aber bei derartigen Anordnungen nicht ohne weiteres möglich, die Stromdichte bzw. die Wärmewirkung in einzelnen Teilen des Heizleiters zu verändern. Die Erfindung betrifft eine Anordnung zur Oberflächenerwärmung von metallischen Werkstücken oder Werkstückteilen und besteht darin, daß die Stromdichte in einzelnen, von den dem Werkstück unmittelbar benachbarten Teilen des Heizleiters relativ zu der Stromdichte in dessen übrigen Teilen durch verbringen von nichtferromagnetischen Metallteilen in die Nähe der betreffenden Heizleiterteile willkürlich veränderbar ist. Ang-ew"end.et werden kann die Erfindung vornehmlich bei der Plattenhärtung, wenn es sich darum handelt, einzelne Teile der Platten in geringerem Maße oder überhaupt nicht zu härten. Des weiteren kann die Erfindung dort angewendet werden, wo es sich um fortschreitende Oberflächenerwärmung von Platten oder Körpern veränderlichen Querschnittes handelt. Hierbei ist es möglich, die Kupplungsunterschiede, die zwischen dem geradlinigen Heizleiter und der Werkstückoberfläche auftreten, durch entsprechende Stromdichteänderung in den einzelnen Abschnitten des Heizleiters auszugleichen, so daß eine gleichmäßige Erwärmung der Oberfläche des Werkstückes erzielt wird.Arrangement for inductive surface heating of metallic workpieces For arrangements for inductive surface heating of metallic workpieces, for example for the purpose of hardening by subsequent quenching, it is 1> eka, nnt, the closed inductor circuit from a heating conductor or inductor relatively small cross-section and a current return relatively large cross-section put together. It is also known to measure the current density in each part of the To make the heating conductor different by arranging different cross-sections. It but with such arrangements, the current density is not readily possible or to change the heat effect in individual parts of the heating conductor. The invention relates to an arrangement for surface heating of metallic workpieces or Workpiece parts and consists in the fact that the current density in individual, of the Workpiece immediately adjacent parts of the heating conductor relative to the current density in the remaining parts by spending non-ferromagnetic metal parts can be changed arbitrarily in the vicinity of the heat conductor parts concerned. Applied the invention can be used primarily in plate hardening, if that is the case is to harden individual parts of the panels to a lesser extent or not at all. Furthermore, the invention can be applied where it is progressive Surface heating of panels or bodies of variable cross-section acts. Here it is possible to reduce the coupling differences between the straight Heat conductors and the workpiece surface occur due to a corresponding change in current density equalize in the individual sections of the heating conductor, so that a uniform Heating of the surface of the workpiece is achieved.
Die Metallteile können gegebenenfalls mit einer besonderen Kühlung versehen werden. Durch den Abstand dieser zusätzlichen Metallteile vom Heizleiter kann der Grad der Stromdichteverringerung in dem dem zu behandelnden Werkstück benachbarten Heizleiterteil beliebig gewählt werden. Durch die Aufheizung dieser zusätzlichen Metallteile wird die für die Aufheizung des. eigentlichen Werkstückes zur Verfügung stehende Leistung und damit die Stromdichte in diesem Heizleiterteil abgeschwächt.The metal parts can optionally be provided with a special cooling system be provided. Because of the distance between these additional metal parts and the heating element can be the degree of current density reduction in the workpiece adjacent to the workpiece to be treated Heat conductor part can be chosen arbitrarily. By heating this additional Metal parts are used for heating up the actual workpiece standing power and thus the current density in this heat conductor part is weakened.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA12108D DE970643C (en) | 1940-04-26 | 1940-04-26 | Arrangement for inductive surface heating of metallic workpieces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA12108D DE970643C (en) | 1940-04-26 | 1940-04-26 | Arrangement for inductive surface heating of metallic workpieces |
Publications (1)
Publication Number | Publication Date |
---|---|
DE970643C true DE970643C (en) | 1958-10-16 |
Family
ID=6922429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA12108D Expired DE970643C (en) | 1940-04-26 | 1940-04-26 | Arrangement for inductive surface heating of metallic workpieces |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE970643C (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE557330C (en) * | 1930-01-01 | 1932-08-22 | Hirsch | Coil for induction furnaces with a cavity arranged offset to the outer circumference of the coil |
US1981629A (en) * | 1930-10-07 | 1934-11-20 | Ajax Electrothermic Corp | Method and apparatus for inductive heating |
DE628433C (en) * | 1930-12-31 | 1936-04-04 | Wilhelm Mueller Dr | Flat coil for eddy current heating |
CH192888A (en) * | 1936-12-03 | 1937-09-15 | Stanislaus Denneen Francis | Method and device for surface hardening of gears and other workpieces provided with projections. |
US2144378A (en) * | 1937-09-11 | 1939-01-17 | Ajax Electrothermic Corp | Induction heater |
-
1940
- 1940-04-26 DE DEA12108D patent/DE970643C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE557330C (en) * | 1930-01-01 | 1932-08-22 | Hirsch | Coil for induction furnaces with a cavity arranged offset to the outer circumference of the coil |
US1981629A (en) * | 1930-10-07 | 1934-11-20 | Ajax Electrothermic Corp | Method and apparatus for inductive heating |
DE628433C (en) * | 1930-12-31 | 1936-04-04 | Wilhelm Mueller Dr | Flat coil for eddy current heating |
CH192888A (en) * | 1936-12-03 | 1937-09-15 | Stanislaus Denneen Francis | Method and device for surface hardening of gears and other workpieces provided with projections. |
US2144378A (en) * | 1937-09-11 | 1939-01-17 | Ajax Electrothermic Corp | Induction heater |
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